GB786399A - Method and apparatus for continuously drawing a glass sheet - Google Patents

Method and apparatus for continuously drawing a glass sheet

Info

Publication number
GB786399A
GB786399A GB1823/56A GB182356A GB786399A GB 786399 A GB786399 A GB 786399A GB 1823/56 A GB1823/56 A GB 1823/56A GB 182356 A GB182356 A GB 182356A GB 786399 A GB786399 A GB 786399A
Authority
GB
United Kingdom
Prior art keywords
spout
glass
magnesia
tank
vault
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB1823/56A
Inventor
Bernard Long
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Compagnies Reunies des Glaces et Verres Speciaux du Nord de la France
Original Assignee
Compagnies Reunies des Glaces et Verres Speciaux du Nord de la France
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Compagnies Reunies des Glaces et Verres Speciaux du Nord de la France filed Critical Compagnies Reunies des Glaces et Verres Speciaux du Nord de la France
Publication of GB786399A publication Critical patent/GB786399A/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B17/00Forming molten glass by flowing-out, pushing-out, extruding or drawing downwardly or laterally from forming slits or by overflowing over lips
    • C03B17/06Forming glass sheets
    • C03B17/067Forming glass sheets combined with thermal conditioning of the sheets
    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B17/00Forming molten glass by flowing-out, pushing-out, extruding or drawing downwardly or laterally from forming slits or by overflowing over lips
    • C03B17/06Forming glass sheets
    • C03B17/061Forming glass sheets by lateral drawing or extrusion
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00Technologies relating to the processing of minerals
    • Y02P40/50Glass production, e.g. reusing waste heat during processing or shaping
    • Y02P40/57Improving the yield, e-g- reduction of reject rates

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Surface Treatment Of Glass (AREA)

Abstract

786,399. Glass drawing. COMPAGNIES REUNIES DES GLACES ET VERRES SPECIAUX DU NORD DE LA FRANCE. Jan. 19, 1956 [Jan. 24, 1955], No. 1823/56. Class 56. Relates to the drawing of a continuous ribbon of glass from a tank in a substantially horizontal direction. The bottom of the drawing tank 2 slopes upwardly to a fairly long spout 6 wherein the depth of the glass is but little greater than the thickness of the ribbon to be formed. The bottom of the tank and the spout are heated by conduction, by electric heaters 10, 14 and the surface of the glass is cooled, by convection by water-cooled air-blowing and suction tubes 15, 17, 19, 20. The spout, at least, is made from a material of low overall emissivity e.g., pure, or substantially pure, alumina, magnesia or silica, ,and the spout may be a separate member removable from the pot 2. Alternatively the spout may be made of ordinary silico-aluminous material the bottom and sides of which are covered by an electrically heated platinum sheet. The vault 22 of the spout may be made of material of high emissivity, e.g., magnesia or chrome-magnesia containing more than 5 per cent iron oxides which ensures that heat radiated from the glass is reflected back. Alternatively the lower face of the vault may be lined with a platinum sheet. These features, taken together, ensure that a maximum temperature gradient is established between the upper and lower surfaces of the glass in the spout whereby the stream of glass comprises a film of high mobility at its lower surface and a skin of high viscosity at its upper surface. The lower surface of the sheet is rapidly hardened by blower and suction tubes 27, 28 immediately after leaving the spout. The spout may be slightly concave along its longitudinal axis and the lateral walls may have longitudinal rounded grooves along their inner edges. Specification 782,149 is referred to.
GB1823/56A 1955-01-24 1956-01-19 Method and apparatus for continuously drawing a glass sheet Expired GB786399A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1120282T 1955-01-24

Publications (1)

Publication Number Publication Date
GB786399A true GB786399A (en) 1957-11-20

Family

ID=9631442

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1823/56A Expired GB786399A (en) 1955-01-24 1956-01-19 Method and apparatus for continuously drawing a glass sheet

Country Status (2)

Country Link
FR (1) FR1120282A (en)
GB (1) GB786399A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014193780A1 (en) * 2013-05-31 2014-12-04 Corning Incorporated Methods and apparatus for producing a glass ribbon
US9758418B1 (en) 2016-04-06 2017-09-12 Corning Incorporated Methods of producing glass ribbon
WO2019170140A1 (en) * 2018-03-09 2019-09-12 汪立新 Glass strip polishing and forming method, and glass substrate production method and production apparatus

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014193780A1 (en) * 2013-05-31 2014-12-04 Corning Incorporated Methods and apparatus for producing a glass ribbon
CN105307988A (en) * 2013-05-31 2016-02-03 康宁股份有限公司 Methods and apparatus for producing a glass ribbon
CN105307988B (en) * 2013-05-31 2018-01-23 康宁股份有限公司 Method and apparatus for producing glass tape
US9938177B2 (en) 2013-05-31 2018-04-10 Corning Incorporated Methods and apparatus for producing a glass ribbon
US9758418B1 (en) 2016-04-06 2017-09-12 Corning Incorporated Methods of producing glass ribbon
US10604436B2 (en) 2016-04-06 2020-03-31 Corning Incorporated Method of producing glass ribbon
WO2019170140A1 (en) * 2018-03-09 2019-09-12 汪立新 Glass strip polishing and forming method, and glass substrate production method and production apparatus

Also Published As

Publication number Publication date
FR1120282A (en) 1956-07-03

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